<html>

<head>
    <style type="text/css">
        div{display: flex;justify-content: space-around;align-items: center;margin: 5px;
        border-style: solid;background-color: white;transition:background-color,1s; }
        #tree{height:30%;padding:5px;}
    </style>
    <script src="24.js">
        </script>
</head>

<body onload="load()">
    <div id="tree">
    </div>
    <button id="delete">delete</button>
    <button id="loop">loop</button>
    <label><input id="text" type="text" /><button id="add">add</button></label>
</body>

</html>